Fatal error: Uncaught Error: Class 'Symfony\Component\EventDispatcher\Event' not found in /home/eberhardschwarze/public_html/vendor/menatwork/contao-multicolumnwizard-bundle/src/Event/CreateWidgetEvent.php:32 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/menatwork/contao-multicolumnwizard-bundle/src/Event/CreateWidgetEvent.php on line 32